Impulse-pump.



W. H. STUTTZ. IMPULSE PUMP APPLICATION ULEB MAYa,1s1a.

Patented Apr; 14, 11914,

INVENTOR.

wsTNESSEs:

WILLIAM H. STUTTZ, OF TOLEDO, HO, .ASSIG-NOIR,

ACKERMAN, OF DETROIT, MICHIGAN.

IMrULsn-PUMP.

Specification of Letters Patent.

Application led May 3, 1913. Serial No. 765,262.

To all whom t may concern:

Be it known that l, WILLIAM H. STUi'rz, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Impulse-Pump; and I do hereby de clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of lthis specification.

This invention relates to impulse pumps for use in connection with internal combus tion engines for iniating automobile tires, or the like. y

The object of my invention is the provision in a pump of the character described7 of simple and inexpensive means for frictionally or otherwise acting on some part of the pump pistons for retarding the initial compressing movements of the pump pistons upon an out or compression stro-ke of the associated engine cylinder piston, whereby the eliiciency of the pump is very materially enhanced, as hereinafter fully described.

Tlie invention is full y described in the fol-A lowing specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof` is illustrated in the accompanying drawings, in which the pump and a portion of the engine cylinder to which it attached are shown in central longitudinal section.

Referring to the drawings, l. and 2 designate what may be termed the power and compression cylinders, respectively, of a pump. In the particular pump illustrated the latter cylinder is smaller in diameter and having its bore in longitudinal register with the bore pt' the other cylinder,as shown.

The cylinder l is provided at its lower end, in the present instance, with an extension 3, forming an inlet passage 4t to the interior of the cylinder, and this extension has a niple or connecting member 5 for threading into the spark plug opening or other suitable opening in the con'ipression end of an engine cylinder G. The outer end of the cylinder is provided with the customary outlet passage 7 in which is disposed an out- -within the cylinder 2.

wardly opening valve 8 of any suitable form.

Pistons 9 and l0 are mounted within the cylinders l and 2, respectively, for working therein and are rigidly connected by a stem l1 to cause the pistons tomove in unison. A passage l2 is provided lengthwise through the stem l1 and the pistons 9 and l0 to open communication between the inlet passage et and the compression cylinder 2 of the pump. A valve 13,in the present instance of the ball type, is disposed in the passage 12 and is adapted to seat under back pressurel from An inwardl opening breather-valve 14 is carried by t e stein ll and adapted to normally close an opening l5 from the stem passage 12 into the interior of the cylinder l above its piston whereby air may be drawn from the atmosphere through inlet openings 16 in the end portion of the cylinder l, adjacent to the cylinder 2, into the cylinder l and thence lthrough the opening l5, passage 12 and into the engine cy nder upon. the down or suction stroke of the engine piston. While the breather-valve is shown as being carried by the stem ll it is not restricted to .use in such connection but may be provided in any other suitable part of the pump, as desired.

` lt is found in practice in the use of pumps of-this character that the connected pistons Sand 10 begin to move outward very shortly after the associated engine piston begins its out or compression stroke, so that when the air, which has been forced into the cylinder 2 through the passage 1l from the engine cylinder, has compressed sutliciently in such cylinder to seat the valve 13 in its passage, the small compressing 'piston 10 will have moved for a considerable portion o-f its stroke so that it will only act during the reinaining portion of such stroke to eti'ect a further compression of the air within the cylinder 2, thus limiting the effective coinpressing action thereof.

ln order to render the pump more eilicient in its action l provide an extension or teat i7 on the piston 9 for itting'into the inlet passage 4 when the piston is at or near the limit of its downslroke, the passage l forms a socket in 'which the teat 17 fits so as Ato form a trictional retaining means whereby the pistons are held or engaged until the pressure produced by the engine BY MESNE ASSIGNMENTS, TO E. L.

Patented Apr. 14, 1914.

is sufficient to cause disengagement. The extension or teat 17 forms a continua-tion of the passage l2 throughy the pump pistons and their connection l1. When the teat 17 is Within the passage or socket d it co-acts with the passage or socket 4 by reason of its close fitting therein which causes an engagement between the extension or teat 17. This frictionally holds the pistons down u'ntilA the pressure of the air is raised by the piston oi' the engine. The air wili leak by the teat and enter the space formed beneath the lower piston. W hen the pressure beneath the lower piston has been raised suthn ciently it will cause disengagement between the Wall of the socket i and the teat 17. The teat 17 may. be further engaged by a detent 18 which is carried in the Wall of the socket to further aid in the retention of the pistons and yet alloW the gradual leakage of the air to beneath the driving piston 9. The detent 18, in the present instance, comprises a ball which Works within a socket in the Wall of the passage 4 and yieldingly pressed by a -spring 19, or any other suit able device, against the outer side Wall of the teat 17 when the piston is at the limit of its downstroke as shown in the drawing. The friction resisting the rotation of the ball gives, ordinarily, suiiicient'additional resistance to hold the pistons temporarily in the operation of the pump and long enough to allow 'the pressure produced by the engine to rise. The pistons 9 and 10 are' retained until the cylinder 20 has been prac-` tically :filled by air at near the limit of the pressure 'producible by the engine so that When the pump pistons are released by. the pressure Which gradually rises be neath the driving piston the pistons Will be driven by pressure near the maximum of the pressure producible by the engine, upward to compress the air above the pump ing piston. This high pressure on the driving piston bcingsubstantially constant gives an'increasing momentum to the'pise tons as they move upward iii-making their stroke which produces an exceedingly high compression oi'the air in the pumping cylindcr by the .impact oiV the stroke. The pressure produciblc by .the pistons in the pumpingcylinder is Way in excess tothat producible by the mere differential relation between the two pistons.

I wish it understood that my invention is not limited to the locating of the retarding means in any particular portion oi` the pump, or to any specific construct-ion or arrangement of the parts'except in so far as such limitations are spreciiied in the claims.

Having thus described my invention, what l claim as new, and desire to secure by Lctters iatent, isfi. The combination of a cylinder, a iioating pump piston movable in the cylinder', means for permitting air to pass in but one direction to the compression side of the pumping piston, means for pneumaticaily' operating the piston, and an. engaging means for holding the said piston at one end of its stroke vuntil the pressure produced by the said pneumatically operating means is surlicient to release the. piston which. is driven by the said pressure.

2. T he combination oi a pair connected pistons having a passage Way extending therethrough, cylinders sur; imding the said pistons, an engaging means ter holding the said pistons at one end of their .stroke and a means for forcing a fluid through the pistons and to disengage the pistons by the pressure of the fluid on one of the pistons 3. The-combination of a pair of connected pistons, a passageway extending through the said pistons, a pair of cylinders, each piston beinglocated in a cylinder, a teat located on ,one piston, one cyllnder having 'a socket to frictlonally engage the teat with -suilicient force to delay the-starting of the iston.

4. The combination of a pair o connected pistons, one being adriving'piston and the,

other a pumping piston, a passage way extending therethrough, a pair of' oyiinders, each piston working in a cylinder, a tout located on the driving piston, a. socket in one end of the cylinder surrounding the driving pistonv to frictionaily engage the teat, and means for forcing air through the passage Way and beneath the drivin piston.

5. The combinationA of a-'pair o. pistons connected together, one being pumping piston and the other a driving piston, a pair of cylinders, each piston located in. a cylin der, a means for permittii'ig air to'pass in but one direction to the compression sideof the pumping piston, an engaging means for holding said pistons at one end 'oil' their stroke and means for :forcing a duid einst the compression side oi the driving piston to cause disengagement oi' thel pistons when the ressure has been raised by fluid forcing means.

6. The combination of a pair of pistons connected together, one a. pumping piston and the other a driving piston,a pair of cylinders, each pistonl located in a, cylinder, the pumping piston havingl a passage Way thorethrough and a valve for permitting air to pass in but one direction through the passage' wayto the compression side of the pumping piston, an engaging means for holding said pistons at one end of their stroke, and means for forcing a fluid into the e linders and against the compression side o the driving piston to disengage the pistons from the engagin'g means and give driving momentum lo the pumping piston.

7. The combination of a pair of connected pistons, a pair of cyiinders, each piston located in a cylinder, one piston being a driving piston and the other piston a pumping piston, means for engaging the pistons to heid them at one end ofl theirl stroke and means for raising the pressure on the driving piston to ca use disengagement of the pistons from the engaging means and producing au increasing momentum in the pistons during the compression stroke. A

S. The combination of a pair of connected pistons having a passage Way extending therethrough`r cylinders surrounding the pistons, one of the pistons being a driving piston and the other a pumping piston, a detent for engaging the pistons when the pistons are at one end of their stroke, means for forcing f1 fluid through the passage Way and causing it to sel'iarate the pistons from the detent when the pressure has heen raised hehnd the driving piston.

9. The combination of a pair of connected pistons having a passage Way extending therethrough, cylinders surrounding the pistons, a breather valve for aliowing air to enter the passage Way to the compression sides of the pistons, a teat located on one piston, one cylinder having a socket. fitting the teat, a detent for engagement of the pistons when the pistons are at one end of their stroke, means for forcing a fluid through the passage Way and to leak by the teat to press upon the piston having the test to disengage the piston.

In testimony whereof, I have hereunto signed my name to 4this specification in the presence of two subscribing witnesses.

NIL'LM H. CTUTTZ.

Witnesses ZF. E. AAUL S. 'Il Know.. 

